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@gleiten tatrs @nicht @Hirn THOMAS L. REED,y or 'PRoviDENoE RHODEISLAND.

Lettere Patent No. 73,039, dated January 7, 1858 antedatcd Decembeti,1867.

IMPROVEMENT IN LOCK-UPLING FOR GAS-FIXTURES.

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TO ALL WHOM IT MAY "CONCERN:

Be it known that I, THOMAS If REED, of the city and county ofProvidence, and State of Rhode Island,

have invented a new and improved Lock-Coupling for Connecting FlexibleTnbing or Hose with Gas-Fixtures, and for other purposes; and I dohereby declare that the following is a full, clear, A and exactdescription ofthe same, reference .being had to the accompanyingdrawings making part of this speciiication, in which- Figure 1 is alongitudinal section of my improved coupling, showing the two partsunited. y Figure 2 is aperspective view'of .the s'ame, the two partsbeing unlocked and separated.v

Figure 3 reprsents the packing used to form ajoint in the said coupling.Similar letters indicate, corresponding parts in all the gures. Mycoupling is in two pieces, A and 13, each of which is provided with ascrew-thread, cut inside, to screw the piece on the tubes or pipes'which are to be coupled orF united.l The parts of the two pieces A andB, by

which the union of thc two is eii'ected, consist of a male and a femalesleeve, m e, the male, m, fitting quite closely into the female,)e,which also hasupo/n the inside an annular groove to rebeive thepacking-ring z', of the same diameter asthe male sleeve wt, and soarranged .that when the male sleeve is inserted within the femalesleeve, the end surface of the male will bear squarely against thepitching, and when held thereon by any suitable means, a gas-ttingjoiritwill be formed, whilethe two parts arc'held firmly together.- And forthepurpose of holding and pressing the two parts A B together, with ythemale sleeve in contact with the packing, as described, I out a helicalgroove, t, wv, on the inside ofthe female sleeve, as shown in fig. `2,and insertin the' side of the male sleeve a pcg or studdo, and when thetwo parts are placed together, the male within the female, by turningthe male sleeve the peg gw'ill enter the helical groove, and be theVmeansof pressingothe male part against the packing, and holding the twoparts iirmly in contact, :ind without liability of accidentaldisconnection.

As a suitable packing for the/purpose, I have used successfully a ringof soft leather, calf-skin or roller leather. But the better packing,and that which I prefer to use, is a ring, composed of aring el' leatherand a i ring of India rubber, cemented-together, as shown in fig. 3, theIndia rubber being placed in the bottom ofthe annular packing-groove,with the leather side uppermost, and presented for the male sleeve topress against,

and form the joint. It will be understood that a packing of thisconstruction combines thc elasticity of the,

rubber with the firmness of the leather, an'd that in this connectionthe parts, being constructed as described, 'the packing subserres twopurposes, namely, first, to form a joint, and secondly, by itselasticity to press and bind' the peg p in` theI groove or screw-threadt of the female sleeve, as to measurably and sufficiently prevent thetwo parts from unscrcwing and becoming accidentally disconnected.

What claim, and desire to secure by Letters Patentfis- 'lhe coupling,constructed substantially as described, with a male and female sleeve,and an annular packing-cavity, and a helical groove, and a peg or stud,in combination, all as and for the purpose sct forth.

Ialso claim the'packing-ring, vcomposed of Indial rubber and leatherunited together, substantially as described for the purpose specificd.

THOMAS L. REED.

Witnesses:

IsAAo A. BRowNELL, D. K. Hoxsrn.

